GMX Series Configuration Guide Coaxial HPGe Photon Detectors

 For Compton-Suppressed Gamma Spectroscopy, for Measurements Involving Spectroscopy Over the Widest Energy Range, and in Any Situation Where Neutron Damage is Likely.
 • Efficiencies to over 100%
 • PopTop flexibility
 • Spectroscopy from 3 keV to 10 MeV
 • ULTRA thin, ultra stable boron ion implanted outer contact
 • High resistance to neutron damage
 • Customer-repairable for neutron damage (option)
 • Excellent timing characteristics
 • Ideal for Compton-suppressed gamma spectroscopy
 • Be window supplied with protective cover; Al or carbon fiber window option
   available at no additional charge
 • High-rate indicator
 • PLUS preamplifier option for ultra-high-rate applications
 • Automatic high-voltage shutdown protects preamplifier input FET
The GAMMA-X detector is a coaxial Germanium (Ge) detector with an ultra-thin entrance window. While most coaxial detectors have entrance windows from 500-to 1000-μm thick, the entrance window of the GAMMA-X detector is a 0.3-μm-thick, ion-implanted contact. Ion implantation results in a totally stable contact which will not deteriorate with repeated cycling.
The GAMMA-X detector is the only Ge spectrometer designed for both gamma-and x-ray spectroscopy with high precision and efficiency for both. This point can be illustrated by comparing the GAMMA-X detector with a LEPS and with an HPGe coaxial detector (Figure. 1). The GAMMA-X detector offers a combination of the performance of the LEPS at low energies and a coaxial detector at high energies.

High- and Low-Energy Performance of the GAMMA-X Detector
The high-energy performance of a GAMMA-X detector is defined by its relative efficiency, resolution, and peak-to-Compton ratio at 60Co.
The low-energy performance of this detector is defined by its resolution at 5.9 keV, its active surface area, and the detector window thickness.
The thickness of the entrance contact of the GAMMA-X detector is described by the ratio of the areas of two peaks of a readily available source. The peaks chosen are those of the 88-keV gamma rays from the 109Cd and of the 22.16-keV Ag K x rays from the same source. The warranted window attenuation ratio is 20.

Download GMX Series Configuration Guide Coaxial HPGe Photon Detectors

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